JP2018155038A - Swing cableveyor (r) structure of a shield machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a swing CABLEVEYOR (R) structure of a shield machine capable of preventing excessive pulling of a plurality of cables wired in at least two stages in a swing CABLEVEYOR (R).SOLUTION: A swing CABLEVEYOR (R) structure of a shield machine includes: a swing CABLEVEYOR (R) having a movable end fixed to a swing ring of an erector device and a stationary end fixed to a shield machine body; a plurality of cables wired in at least two stages in the radial direction of the swing ring in the swing CABLEVEYOR (R); and a support mechanism provided in the vicinity of at least one of the movable end and the stationary end so as to support the cables in a manner allowing cables at each stage among the plurality of cables, to be slid relative to cables at other stages.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a swivel cable bear structure of a shield machine (cable bear: registered trademark).

  In the shield machine, the segments are assembled at predetermined positions on the tunnel wall surface by an erector device that is pivotally attached to the machine body. Some such shield machines have a swivel cable bear between the machine body and the erector device. A plurality of cables such as a hydraulic hose and an electric cable connected to the distal end side of the erector apparatus are routed in the swivel cable bear. The swivel cable bear has an arc-shaped inner peripheral side portion and an outer peripheral side portion that are connected to each other by a turn-back portion, and their lengths change as the elector device turns.

  For example, Patent Document 1 discloses a swivel cable in which one end of the swivel cable bear (the end of the outer peripheral side portion) is fixed to the swivel ring of the erector apparatus and the other end (the end of the inner peripheral side portion) is fixed to the excavator body. A bare structure is disclosed.

Japanese Patent Laid-Open No. 10-238299

  By the way, in the above-described swivel cable bear structure, generally, a plurality of cables arranged in the cable bear are fixed by clamps in the vicinity of both ends of the swivel cable bear. Usually, a plurality of cables are routed side by side in the swivel cable.

  In recent years, the number and thickness of cables routed in a swivel cable bear may increase from the viewpoints of an increase in tunnel diameter and explosion-proof specifications for electrical equipment. In this case, it is conceivable that a plurality of cables are routed in the turning cable bear in at least two stages in the radial direction of the turning ring.

  In such a case, the cable located radially inward at the folded portion of the swivel cable bear (those having a small radius of curvature at the folded portion) and the cable located radially outside at the folded portion (curvature at the folded portion) The required length is different from the one with a large radius). For this reason, if the cable is fixed with clamps in the vicinity of both ends of the swivel cable bear, when the erector device swivels, either the inner cable or the outer cable may be forcibly pulled.

  Accordingly, the present invention provides a swivel cable bear structure for a shield machine capable of preventing excessive pulling of a plurality of cables routed in a swivel cable bear in at least two stages in the radial direction of the swivel ring. For the purpose.

  In order to solve the above-mentioned problem, the swivel cable bear structure of the shield machine according to the present invention includes a swivel cable bear having a movable end fixed to the swivel ring of the elector device and a stationary end fixed to the main body of the excavator. Of the plurality of cables arranged in at least two stages in the radial direction of the swivel ring in the swivel cable bear, and the plurality of cables provided near at least one of the movable end and the stationary end And a support mechanism for supporting the cables of each stage so as to be able to slide relative to the cables of the other stages.

  According to said structure, even if an erector apparatus turns and either an inner side cable or an outer side cable is going to be pulled, the cable will slide. Therefore, excessive pulling on the cable can be prevented.

  The support mechanism includes a plurality of pipes that accommodate the plurality of cables, a block having a plurality of guide holes through which the plurality of pipes are respectively inserted, and the plurality of pipes with respect to the block. And a plurality of springs biased on both sides in the direction. According to this configuration, the cable can be returned to the neutral state in which the cable can be slid in both directions by the biasing force of the spring when the erector device is turned backward from a state where it is greatly turned to near the reference position.

  ADVANTAGE OF THE INVENTION According to this invention, the excessive tension | pulling with respect to the several cable wired by at least 2 step | paragraph in the radial direction of a turning ring in a turning cable bear can be prevented.

It is sectional drawing of the shield machine which the turning cable bear structure which concerns on one Embodiment of this invention was employ | adopted. It is the front view of a turning cable bear and a turning ring seen along the II-II line of FIG. It is sectional drawing along the III-III line of FIG. FIG. 3 is a diagram illustrating a state where the erector apparatus is rotated 210 degrees counterclockwise from the state of FIG. 2. It is a top view of a support mechanism. It is the side view which showed a part of support mechanism in the cross section. It is sectional drawing along the VII-VII line of FIG.

  FIG. 1 shows a shield machine 10 in which a turning cable bear structure according to an embodiment of the present invention is adopted. The shield machine 10 includes a machine 1 and an erector device 2.

  The excavator main body 1 includes a cutter head 11, a front cylinder 12 and a rear cylinder 13. A plurality of shield jacks 14 that press the segments 25 to advance the excavator main body 1 are disposed inside the front cylinder 12 and the rear cylinder 13. The erector apparatus 2 is attached to the framework 15 of the rear trunk 13 so as to be able to turn.

  The erector apparatus 2 assembles the segment 25 at a predetermined position on the tunnel wall surface. The erector apparatus 2 includes a swivel ring 21 supported so as to be able to swivel along the rear drum 13 inside the rear drum 13, and a sliding portion attached to the swivel ring 21 and transporting the segment 25 to a predetermined position on the tunnel wall surface. 26 and a gripping portion 27 that is attached to the tip of the sliding portion 26 and grips the segment 25. In addition, the turning ring 21, the sliding part 26, and the holding part 27 are operated by the operator. As shown in FIG. 2, in this embodiment, the swivel ring 21 is supported by a plurality of rollers 16 attached to the framework 15 of the rear trunk 13 so as to be swivelable. However, the turning ring 21 may be supported so as to be turnable by a turntable bearing.

  A swivel cable bear 3 is disposed inside the swivel ring 21. The swivel cable bear 3 has an arcuate inner peripheral side portion and an outer peripheral side portion that are opposed to each other in the radial direction. The inner peripheral portion and the outer peripheral portion are connected to each other by a folded portion.

  In this embodiment, the end of the outer peripheral side portion of the swivel cable bear 3 is a movable end 32 fixed to the swivel ring 21, and the end of the inner peripheral side portion is a stationary end 31 fixed to the excavator main body 1. is there. The erector device 2 is configured to be able to turn to a predetermined angle (for example, 210 degrees) clockwise and counterclockwise with the position shown in FIG. 2 as a reference position. For example, FIG. 4 shows a state where the erector apparatus 2 is turned 210 degrees counterclockwise. However, the swivel cable bear 3 is arranged outside the swivel ring 21, the end of the outer peripheral side portion of the swivel cable bear 3 is fixed to the excavator body 1, and the end of the inner peripheral side portion is fixed to the swivel ring 21. It may be a movable end.

  More specifically, as shown in FIG. 3, the outer peripheral side portion of the swivel cable bear 3 is guided by an outer cable bearer receiver 43 having a U-shaped cross section, and the inner peripheral side portion is an inner cable bearer receiver having a U-shaped cross section. 41 to guide. In the present embodiment, as shown in FIG. 2, the outer cable bear receiver 43 is divided into two guide pieces 44, and the inner cable bear receiver 41 is divided into three guide pieces 42. However, the outer cable bear receiver 43 may be divided into three or more guide pieces 44 or may be a single member. Further, the inner cable bear receiver 41 may be divided into two or four or more guide pieces 42 or may be a single member.

  The outer cable bear receiver 43 is attached to the turning ring 21 via a bracket 45. On the other hand, the inner cable bear receiver 41 is attached to the rear trunk 13 via a bracket (not shown).

  In the present embodiment, the swivel ring 21 includes a narrow outer peripheral plate 22, a wide inner peripheral plate 24 protruding forward from the outer peripheral plate 22, and a pair of connecting plates 23 that connect them. The cable bear 3 is disposed at a position close to the front. However, it goes without saying that the configuration of the swivel ring 21 and the position of the swivel cable bear 3 are not limited to this.

  A plurality (four in the illustrated example) of cables 6 are routed in the turning cable bear 3 in at least two steps (two steps in this embodiment) in the radial direction of the turning ring 21. For example, the cable 6 is a hydraulic hose or an electric cable that is connected from the stationary side (power supply unit, hydraulic supply / discharge unit, etc., not shown) to the movable side (sliding unit 26, gripping unit 27, etc.). However, the cable 6 is not limited to these.

  As shown in FIG. 2, in the present embodiment, the support mechanism 5 is provided in the vicinity of both the movable end 32 and the stationary end 31 of the turning cable bear 3. Each support mechanism 5 supports the cable 6 at each stage of the plurality of cables 6 so that it can slide relative to the cables 6 at the other stages. In this embodiment, each support mechanism 5 supports a plurality of cables 6 so that they can slide relative to each other. However, the support mechanism 5 is provided only in the vicinity of one of the movable end 32 and the stationary end 31 of the swivel cable bear 3 so that the plurality of cables 6 cannot slide relative to each other in the vicinity of the other. A clamp may be provided for fixing to.

  As shown in FIGS. 5 to 7, each support mechanism 5 includes one rectangular parallelepiped block 8 and the same number of tubes 7 as the cables 6 that penetrate the block 8. The tube 7 accommodates the cables 6 individually.

  In the present embodiment, each tube 7 is divided into a pair of half tubes 71. At both ends of the half tube 71, flanges 72 are provided, and the flanges 72 are fastened with bolts B2.

  The block 8 is directly or indirectly fixed to the cable bearer (the outer cable bearer 43 or the inner cable bearer 41) by the bolt B1.

  The block 8 is provided with a plurality of guide holes 8a through which the pipes 7 are respectively inserted. In the present embodiment, the guide holes 8a are arranged in a matrix. However, the guide holes 8a may be arranged in a staggered manner.

  In the present embodiment, the block 8 is divided into three block pieces 81 to 83 in the vertical direction (in the radial direction of the turning ring 21) at the center of the guide hole 8a. However, the block 8 may be a single member.

  The same number of springs 9 as the cable 6 are arranged on one side and the other side of the block 8. These springs 9 urge the tube 7 against the block 8 on both sides in the axial direction of the tube 7.

  More specifically, the spring 9 is a compression coil spring and is interposed between both flanges 72 and the block 8 of each pipe 7.

  As described above, in the swivel cable bear structure of the present embodiment, the erector device 2 swivels due to the action of the support mechanism 5 and the inner cable 6 (having a small radius of curvature at the folded portion of the swivel cable bear 3). Even if one of the outer cable 6 and the outer cable 6 (having a large radius of curvature at the folded portion of the swivel cable bear 3) is pulled, the cable 6 slides. Therefore, excessive pulling on the cable 6 can be prevented.

  Furthermore, in this embodiment, since the springs 9 are arranged on both sides of the block 8 of the support mechanism 5, when the erection device 2 is swung backward from the largely swung state to near the reference position, the spring 9 is biased. The cable 6 can be returned to a neutral state that can slide in both directions.

  In addition, this invention is not limited to embodiment mentioned above, A various deformation | transformation is possible in the range which does not deviate from the summary of this invention.

  For example, the block 8 may be divided into the same number of block pieces as the tube 7. It is also possible for one tube 7 to accommodate several of the same stage cables 6.

DESCRIPTION OF SYMBOLS 10 Shield machine 1 Engraver body 2 Elector device 21 Rotating ring 3 Rotating cable bear 31 Fixed end 32 Movable end 5 Support mechanism 6 Cable 7 Pipe 8 Block 8a Guide hole 9 Spring

Claims (2)

A swivel cable bear having a movable end fixed to the swivel ring of the elector device, and a stationary end fixed to the excavator body;
A plurality of cables arranged in at least two stages in the radial direction of the swivel ring in the swivel cable bear;
A support mechanism that is provided in the vicinity of at least one of the movable end and the stationary end, and supports the cables of each stage of the plurality of cables so that the cables can slide relative to the cables of the other stages. ,
Rotating cable bear structure for shield machine. The support mechanism includes a plurality of pipes that accommodate the plurality of cables, a block having a plurality of guide holes through which the plurality of pipes are respectively inserted, and the plurality of pipes with respect to the block. The swivel cable bear structure of the shield machine according to claim 1, comprising a plurality of springs biased to both sides in the direction.

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